I think I needed the sleep. It's possible I overexerted myself yesterday, with all the mechanical stuff and running around.
Work tomorrow, and it doesn't promise to be any easier than normal, so the rest was warranted.
* * *
I plugged in the Arduino. Its test program, where it blinks an LED, is running. I've never been more entranced by a blinking light in my life.
* * *
I already do this. The Works is a toilet bowl cleaner which is heavy on the HCl, and it works very, very well at removing rust stains from everything.
I had to think about the name of the toilet bowl cleaner, because now I have a fever and can't think. *sigh*
